Classes Are Objects Too

Q

Are classes objects in Python?

✍: FYIcenter.com

A

Yes, all classes are objects of "type" type in Python? You can verify this with the following Python code:

>>> class x:
...    pass
...
>>> type(x)
<class 'type'>

In other words, the "class x" statement block performed two activities:

Creates a new "type" object and hiding its statement block inside.
Introduced a variable "x" to reference to the "type" object.

Like any other types of objects, you can use the "dir()" to list its members:

>>> class x:
...    pass
...
>>> dir(x)
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', 
'__form at__', '__ge__', '__getattribute__', '__gt__', '__hash__', 
'__init__', '__init_s ubclass__', '__le__', '__lt__', '__module__', '__ne__', 
'__new__', '__reduce__',  '__reduce_ex__', '__repr__', '__setattr__', 
'__sizeof__', '__str__', '__subclas shook__', '__weakref__']

⇒ Manage and Use Class Properties

⇐ 'class' - Class Definition Statements

⇑ Defining and Using Class for New Data Types

⇑⇑ Python Tutorials

2018-05-08, 1469🔥, 0💬

Create New Instances of a Class
How to Create a New Instance of a Class? There are two ways to create a new instance (object) of a class (or type): 1. The short way: Call the class name as the class constructor function with the following syntax. It will return an instance of the given class. >>> x = class_nam... 2018-01-27, ∼2829🔥, 0💬

'@...' Function Decorators
What are function decorators in Python? A function decorator is shorthand notation to replace a function with a new version transformed by a wrapper function. A function decorator can be specified using the following syntax: @decorator_wrapper_function def func(): ... Above Python code is actually e... 2018-05-08, ∼2467🔥, 0💬

What Is Wrapper Function
What is a wrapper function in Python? A wrapper function in Python is a function that takes an old function as input parameter and returns a new function. The new function should have the same parameter list and return type. If you call the new function, it will perform the same task as the old func... 2018-02-08, ∼2395🔥, 0💬

Defining and Using Class for New Data Types
Where to find tutorials on Defining and Using Class for New Data Types in Python? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Defining and Using Class for New Data Types in Python: What Is Class 'class' - Class Definition Statements Classes... 2018-05-08, ∼1768🔥, 0💬

What Is Class
What Is Class in Python? A class in Python is a statement block that defines a new data type. A class can have the following elements: Class name - A symbolic name that uniquely identifies this class within the context. The class name is also the new data type name. Base class - An existing class fr... 2018-05-08, ∼1724🔥, 0💬

What Is Class Method
What is class method in Python? Class methods are functions defined inside the class definition statement block. You can call to execute a class method in two formats: 1. Calling the method with the class name in the dot (.) expression format: class_name.method_name(...). For example, >&g... 2018-01-27, ∼1690🔥, 0💬

Manage and Use Class Properties
How to manage and use class properties? Class properties, also called class attributes, are name value pairs associated with class "type" object, and shared among all instances (objects) created from this class. You can manage and use class properties in various places: 1. In the class definition st... 2018-01-27, ∼1681🔥, 0💬

'class' - Class Definition Statements
How to use the "class" statement to define a new function in Python? You can use the "class" statement to define a new class in Python with the following syntax: def class_name(base_class): class properties assignment statement ... method definition statement ... Here is a good example of "class" st... 2018-05-08, ∼1581🔥, 0💬

Where Are Class Properties Stored
Where Are Class Properties Stored? Class properties are stored in a built-in property called "__dict__" in class "type" object. The "__dict__" property is inherited from the base class "object" and managed by the Python engine. If you ever forget what class properties are associated with a class, yo... 2018-01-27, ∼1535🔥, 0💬

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